Assigning a static IP address on the TPVM Linux OS

To use a static IP address, you add the static method for the interface in the file /etc/network/interfaces.

Procedure

Obtain your current address, network mask, and broadcast address.

device# ifconfig
...
eth0 Link encap:Ethernet HWaddr 00:0a:21:ff:45:2a
 inet addr:10.10.10.0 Bcast:10.10.10.255 Mask:255.255.255.0
...

This example displays the first Ethernet interface identified as eth0.

Obtain your gateway and network address.

device# route -n
Kernel IP routing table
 Destination  Gateway      Genmask        Flags  Metric  Ref  Use  Iface
 0.0.0.0      10.10.10.2   0.0.0.0        UG     100     0    0    eth0
 172.16.77.0  0.0.0.0      255.255.255.0  U      0       0    0    eth0

Use flags u and g for the route gateway. The other IP address is the network IP address.

Open the interfaces file.
```
device# sudo nano /etc/network/interfaces
```
Nano is the GNU version of the Pico text editor. Use the editor of your choice.
Find the DHCP settings in the /interfaces file. They will appear as text similar to the following example.
```
...
auto eth0
iface eth0 inet dhcp 
...
```
Replace the settings shown in step 4 with the following settings.
```
...
auto eth0
iface eth0 inet static
address 10.0.0.100
netmask 255.255.255.0
gateway 10.0.0.0
...
```
This example configures the first Ethernet interface, identified as eth0.
Save the file and exit to the command prompt.
Make sure that your name server IP address is your gateway IP address.
```
device# sudo nano /etc/resolv.conf
```

Restart the networking components.

device# sudo /etc/init.d/networking restart

If you want this as a permanent change, remove the DHCP client so it can no longer assign dynamic IP addresses.
```
device# sudo apt-get remove dhcp-client
```
Verify connectivity.
```
device# ping www.extremenetworks.com
```
Manually enable the interface.
```
device# sudo ifup eth0
```